Sprint Tour will not register with Local Sim Chip

I was hoping if anybody had a solution..I travel back and forth to Colombia with a Sprint Tour and use Tigo in Colombia with a prepaid sim chip. My SMS and Telephone service work but they also offer prepaid blackberry service via 1 day 7 days or 30 days...All you have to do is text the code and it will turn but your blackberry needs to register first before this can work...My tour will not register and running the diagnostic test it comes back abort on the blackberry data test. When I come back to Miami it automatically updates back to Sprint. Was wondering if anybody has issues or a solution when traveling abroad using the local sim chip and getting the blackberry service to register..